Before the Common Era
From Trekipedia
c.500,000 BCE
- The star in the Exo system begins to cool, eventually turning Exo III from Class M to Class O. The Exoites begin to retreat to underground cave systems to escape the surface plummeting temperatures.[1]
c.2705 BCE
Notes and References
- ↑ Roddenberry, Gene (Executive Producer). "Balance of Terror". Star Trek, season 1, episode 14 (Production number 09). Directed by Vincent McEveety. Written by Paul Schneider. Desilu Productions. 15 December 1966.
- ↑ Roddenberry, Gene (Executive Producer) and Freiberger, Fred (Producer). "All Our Yesterdays." Star Trek, Season 3, Episode 23. Directed by Marvin Chomsky. Written by Jean Lisette Aroeste. Paramount Pictures Corporation, 14 March 1969.
